Buderus 500-28C User manual

Brand: Buderus

Model: 500-28C

Category: Water heaters & boilers

Type: User manual

This manual is also suitable for

500-24C

7215 3300 – 07/2007 GB/IE (en) For the user

Please read thoroughly before operating the unit

Users manual

Gas wall hung Boiler condensing

Buderus 500-24C

Buderus 500-28C

2 Users manual for Buderus 500-24C and 500-28C • 07/2007

Buderus • http://www.buderus.co.uk Subject to modifications resulting from technical improvements

Preface

Introduction

Please read these instructions and follow them carefully for a

safe and economical use of your combi boiler.

Important general instructions for use

This device should only be used for its intended purpose and

in accordance with the regulations.

It is a requirement and in your own interest, and that of safety

that this boiler must be installed by a CORGI registered

installer, in accordance with the relevant requirements of the

current Gas Safety (Installation and Use) Regulations,

The Building Regulations, current I.E.E. Wiring Regulations

and the relevant British Standard Codes of Practise.

The device may only be used in combination with the units,

accessories and spare parts listed in the installation and

maintenance instructions.

Other combinations of units, accessories and consumables

are only to be used if they completely fulfil the specifications

involved, and if system performance and safety are not

affected in any way.

Subject to technical modifications

Constant development efforts may result in minor differences

between illustrations, functional steps and technical data.

Cleaning

For normal cleaning simply dust with a dry cloth. To remove

stubborn marks and stains, wipe with a damp cloth and soap

and finish off with a dry cloth.

DO NOT use abrasive cleaning materials.

Gas Council Aplliance No. :

Buderus 500-24C : 47-110-04

Buderus 500-28C : 47-110-03

Users manual

Users manual for Buderus 500-24C and 500-28C • 07/2007 3

Subject to modifications resulting from technical improvements Buderus • http://www.buderus.co.uk

Contents

1 Safety precautions. . . . . . . . . . . . . . . . . . . . . 4

2 Installation area / boiler room. . . . . . . . . . . . 4

3 Working in the heating system. . . . . . . . . . . 4

4 Functions of the system and operating

instructions . . . . . . . . . . . . . . . . . . . . . . . . . . 4

5 Maintenance intervals . . . . . . . . . . . . . . . . . . 4

6 Conversion to LPG . . . . . . . . . . . . . . . . . . . . 4

7 Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 4

8 Permanent clearances. . . . . . . . . . . . . . . . . . 5

9 DBA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

10 Initial start-up . . . . . . . . . . . . . . . . . . . . . . . . . 7

10.1 Preparing the boiler for operation . . . . . . . . . . 7

10.2 Operational and fault codes . . . . . . . . . . . . . . . 9

11 Taking the system out of service . . . . . . . . 10

11.1 Draining the system in case of frost. . . . . . . . 10

Preface

Dear Customer,

Your Buderus 500 Series wall-mounted condensing gas

combi boiler has been designed and built in accordance with

state-of-the-art technological standards and the recognised

safety rules. Special focus has been placed on operator con-

venience in this respect.

Carefully read the safety instructions and operating manual to

ensure safe, economic and ecologically beneficial use of the

unit.

Due to the high efficiency of the boiler a plume of water vapour

may form at the terminal during operation. This is normal.

Users manual

4 Users manual for Buderus 500-24C and 500-28C • 07/2007

Buderus • http://www.buderus.co.uk Subject to modifications resulting from technical improvements

1 Safety precautions

2 Installation area / boiler room

3 Working in the heating system

It is recommended to enter into a service contract with

a specialist company.

4 Functions of the system and

operating instructions

The installer should familiarize the user with the functions and

operation of the heating system and ensure that a complete set

of technical documentation is supplied.

5 Maintenance intervals

For optimum, long-term reliable functioning of the heating

boiler, and in order to be able to claim under the terms of the

manufacturer's warranty, the heating boiler must be inspected

and maintained at least once a year (under normal operating

conditions) by an officially recognized installation and service

engineer. The term "normal operating conditions" means that

the heating boiler is used to provide central heating and/or hot

water to no more than one single-family dwelling.

In all other cases, the heating boiler must be inspected and

maintained by an officially recognised installation service engi-

neer every 2,500 burner operating hours.

6 Conversion to LPG

The boiler is suited for natural gas. To convert the boiler to

LPG you must contact a CORGI registered fitter.

7Abbreviations

DBA = Control unit (Dedicated Burner Automat)

MCW inlet = Mains Cold Water inlet

DHW outlet= Domestic Hot Water warm outlet

CH flow = Central Heating flow

CH return = Central Heating return.

IF YOU SMELL GAS:

DO NOT SMOKE OR STRIKE MATCHES

DO NOT TURN ELECTRICAL SWITCHES ON OR OFF

PUT OUT NAKED FLAMES

OPEN DOORS AND WINDOWS

KEEP PEOPLE AWAY FROM AFFECTED AREA

TURN OFF THE CONTROL VALVE AT THE GAS METER

CALL THE NATIONAL GAS EMERGENCY SERVICES,

FREE ON: 0800 111 999

NOTE

In the event of any other type of incident, shut off

the main gas supply and electric supply to the

appliance and seek assistance from a CORGI

registered engineer.

DANGER!

The air intake and outlet openings must not be

reduced in size or closed.

DANGER!

Do not store or use inflammable materials or

liquids near the heating boiler.

NOTE

To prevent the boiler from being damaged, care

must be taken not to contaminate the combustion

air with halogenated hydrocarbons (e. g. con-

tained in aerosol sprays, solvents, detergents,

paints, and adhesives), or with high quantities of

dust. The room in which the boiler is installed

must be frost-proof and be well ventilated.

DANGER!

Only a CORGI registered Engineer is to be

entrusted with the installation of this boiler, the

gas supply and the flue connection. Commission-

ing, Servicing and any Repairs must be carried

out by a competent person i.e.:

a CORGI Registered Engineer.

All CORGI Registered Installers carry a CORGI

identification card and have a registration

number. Both should be recorded in your boiler

logbook. You can check if your installer/Engineer

is registered by telephoning 01256 372300 or by

writing to:

CORGI, 1 Elmwood, Chineham Business Park,

Crockford Lane, Basingstoke. RG24 8WG.

NOTE

The heating boiler is designed exclusively for

heating water as part of a central heating system

and/or hot-water system.

Users manual

Users manual for Buderus 500-24C and 500-28C • 07/2007 5

Subject to modifications resulting from technical improvements! Buderus • http://www.buderus.co.uk

8 Permanent clearances

The boiler must be located in an area with the following

permanent clearances.

5 mm 5 mm

8 mm

21 mm21 mm

NOTE

The permanent clearances do not change if a

wall spacing frame is used.

The installer or service engineer must be able

to create sufficient service clearences. These

clearences should have been considered at

time of installation.

Users manual

6 Users manual for Buderus 500-24C and 500-28C • 07/2007

Buderus • http://www.buderus.co.uk Subject to modifications resulting from technical improvements!

9DBA

The boiler is equipped with a boiler control unit (DBA). This is

the internal control of the boiler. The DBA is located behind the

access panel.

The DBA allows you to operate the boiler and to make adjust-

ments in its settings.

DBA overview:

1. Mains switch (see fig. 1)

Use this switch to turn the boiler on or off.

2. Reset button B (see fig. 1)

When a blinking code is in the display, it is possible to try and

restart the boiler by pressing this button.

3. Service Button A (see fig. 1)

Is used for servicing purposes only.

DO NOT use this button!

4. Display (see fig. 1)

Setting, adjustments and fault codes are displayed on the DBA

(see fig. 2).

5. Menu button E (see fig. 1)

The menu button E allows you to scroll through the menu

items.

Pressing the E button once to display the current warm start

function setting.

Pressing the E button twice to display the current DHW tem-

perature setting.

Pressing the E button three times to display the current set-

ting of summer operation.

Pressing the E button four times to display the current CH

flow temperature setting.

6. and 7. Up C and Down D keys (see fig. 1)

These keys can be used for adjusting temperatures and

activating or de-activating certain summer operation.

The C key, when pressed, gives the current operating status

of the boiler. Press the D key once to display the current DHW

flow in l/m.

fig. 1 DBA

item 1: mains switch

item 2: "reset" button

item 3: "service" button

item 4: display

item 5: "menu" button

item 6: adjusting arrow up

item 7: adjusting arrow down

3 4 5 6

NOTE

It is not possible to reset the boiler when there

is no fault code blinking in the display.

fig. 2 DBA display

Users manual

Users manual for Buderus 500-24C and 500-28C • 07/2007 7

Subject to modifications resulting from technical improvements! Buderus • http://www.buderus.co.uk

10 Initial start-up

10.1 Preparing the boiler for operation

Please also note the user manual supplied with the

external time controls and thermostat.

10.1.1 Check water pressure

z Check the pressure gauge (fig. 3, item 3) located at the

bottom of the boiler for the current system pressure.

Optimum system pressure is 1.5 bar.

10.1.2 Fill the heating system

The system should be filled with untreated mains water.

z Turn off the boiler by pressing the mains switch to "0".

z If necessary open the CH flow and CH return servicing

valves (fig. 3, item 1 and 2).

z Connect filling loop (fig. 5).

z Open both stop valves (fig. 5).

z Fill the system to a pressure of approx. 1.5 bar (fig. 3,

item 3).

z Close both stop valves.

z Vent the air from all radiators starting with the lowest radia-

tor and working up to the highest point.

z Check the pressure after venting. If the pressure has

dropped under 1.0 bar then top up the system as described

previously.

z Disconnect the filling loop and cap off.

fig. 3 Servicing shut off valves

flow

Gas

return

DHW

outlet

MCW

inlet

WARNING!

The wall-mounted condensing gas combi boiler

must not be activated at this stage.

fig. 4 DBA – Mains switch

fig. 5 Connecting filling loop

filling loop

stop

valve

stop

valve

double

check

valve

MCW

inlet

return

NOTE

If there are frequent water losses, have the

system examined and repaired by a CORGI

registered installer. Have the inhibitor concen-

tration checked every year.

Users manual

8 Users manual for Buderus 500-24C and 500-28C • 07/2007

Buderus • http://www.buderus.co.uk Subject to modifications resulting from technical improvements!

10.1.3 Temperature-setting adjustments

Setting the warm start function

z Press E button once.

z Use the C and D keys to turn the warm start function on

or off (table 1). Factory setting: warm start function is "on".

Setting the domestic hot water (DHW) temperature

z Press E button (see fig. 6, item 2) twice then adjust the

DHW temperature to the desired temperature (40 °C -

60 °C) using the C and D keys (see fig. 6, item 1).

Factory setting is 48 °C.

Setting the boiler to summer operation

When you want to make sure that your boiler will not operate

for central heating in the summer then you can set the boiler to

summer operation. The boiler will then only operate for DHW.

z Press the E button (see fig. 6, item 2) three times.

The current setting blinks.

z Use the C and D keys to adjust to desired setting.

Setting the flow temperature for CH

z Press E button (see fig. 6, item 2) four times then adjust

the flow temperature to the desired temperature (30 °C –

80 °C) using the C and D keys (see fig. 6, item 1).

Factory setting is 80 °C.

Setting Meaning

H - ECO / cold start

More energy efficient, less chance of

calcification, longer waiting periods.

I - comfort / warm start

Maximum comfort due to short

waiting period for warm water. Not as

energy efficient as the cold start and

there is more chance of calcification.

table 1 Warm start function

fig. 6 DBA – adjustment arrows

Central heating is on

Central heating is off (summer operation).

DHW is still available

NOTE

When summer operation is active then the

boiler will not operate for central heating until

summer operation has been deactivated.

NOTE

It is not possible to set the flow temperature

when the boiler is set to summer operation.

Users manual

Users manual for Buderus 500-24C and 500-28C • 07/2007 9

Subject to modifications resulting from technical improvements! Buderus • http://www.buderus.co.uk

10.2 Operational and fault codes

Operating conditions and possible faults can be seen, pressing

the C key.

All codes not contained in table 2 should be noted down

separately. These are malfunctions that require the presence

of a CORGI installer.

Display after

pressing

service

button

Meaning Rectification

0A, 0C, 0E,

0H, 0L, 0U,

Boiler is ready for

operation

Burner not ignited

Press Reset button

(fig. 6, item 3). If the

burner fails to ignite after

several unblocking opera-

tions, consult a CORGI

installer.

-H

Normal heating

mode

Maximum comfort when

set at 60 °C

Normal hot water

mode

table 2 Operational and fault codes

Users manual

10 Users manual for Buderus 500-24C and 500-28C • 07/2007

Buderus • http://www.buderus.co.uk Subject to modifications resulting from technical improvements!

11 Taking the system out of service

z Turn off the boiler by pressing the mains switch to "0" (fig. 4,

item 1).

z Close the gas service valve by turning it clockwise

(fig. 7, item 1).

Frost protection

The boiler has an automatic frost protection. When the CH flow

temperature drops below 7 °C then the boiler will start up.

11.1 Draining the system in case of frost

It is not recommended, but if the boiler needs to be shut down

for a longer period of time, then it is necessary to drain the sys-

tem. Especially when there is a chance for frost conditions.

z Turn off the boiler by pressing the mains switch to "0" (fig. 4,

item 1).

z Close the gas shut off valve (fig. 7, item 1).

z Drain the system at its lowest point using the stop valves or

radiator (see fig. 8). The automatic air vent at the system’s

highest point must be open.

fig. 7 Gas service valve

1: Gas valve closed

2: Gas valve open

fig. 8 Draining the system

Note

Users manual for Buderus 500-24C and 500-28C • 07/2007 11

Subject to modifications resulting from technical improvements! Buderus • http://www.buderus.co.uk

Heating system specialist:

Buderus

Cotswold Way

Warndon

Worcester

WR4 9SW

Telephone: 01905 - 752 936

Fax: 01905 - 753 130

www.buderus.co.uk

Buderus is a trading name of BBT Thermotechnology UK Ltd.

Customer Services:

Technical Product Support:

Sales:

Returns:

Spares:

Tel: 0870 - 421 5933

Tel: 0870 - 421 5944

Tel: 01905 - 752 640

Tel: 01905 - 752 531

Tel: 01905 - 752 576

Fax: 01905 - 456 445 / 455 394

Fax: 01905 - 455 392

Fax: 01905 - 754 620

721.533A - 4673 - 07/2007

Buderus 500-28C User manual

Brand: Buderus

Model: 500-28C

Category: Water heaters & boilers

Type: User manual

This manual is also suitable for

500-24C

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Buderus 500-28C User manual

This manual is also suitable for

Buderus 500-28C User manual

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